Slow-roll inflation in (R+R*4) gravity
High Energy Physics - Theory
2011-01-11 v3 General Relativity and Quantum Cosmology
Abstract
We reconsider the toy-model of topological inflation, based on the R*4-modified gravity. By using its equivalence to the certain scalar-tensor gravity model in four space-time dimensions, we compute the inflaton scalar potential and investigate a possibility of inflation. We confirm the existence of the slow-roll inflation with an exit. However, the model suffers from the eta-problem that gives rise to the unacceptable value of the spectral index n_s of scalar perturbations.
Keywords
Cite
@article{arxiv.1002.3659,
title = {Slow-roll inflation in (R+R*4) gravity},
author = {S. Kaneda and S. V. Ketov and N. Watanabe},
journal= {arXiv preprint arXiv:1002.3659},
year = {2011}
}
Comments
12 pages, 3 figures, LaTeX, misprints corrected and references updated